PupilPupil DisordersReflex, PupillaryTonic PupilConstrictionVasoconstrictionConstriction, PathologicMydriaticsTropicamideArteriolesMydriasisMiosisIrisAnisocoriaAccommodation, OcularDuctus ArteriosusVasoconstrictor AgentsAdie SyndromeRefraction, OcularAberrometrySchoolsEye ColorBronchoconstrictionCyclopentolateAmniotic Band SyndromeLightPhenylephrineRefractive ErrorsVasodilationMuscle TonusCorneal TopographyMuscle, Smooth, VascularPericarditis, ConstrictiveCardiomegalyPia MaterVisual AcuityDogsRats, Sprague-DawleyCerebral ArteriesMesenteric ArteriesBlood PressureVascular ResistanceHyperesthesiaPressureVasomotor System15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidSciatic NeuropathyDose-Response Relationship, DrugActomyosinArteriesMicrocirculationRod OpsinsDark AdaptationCoronary VesselsNorepinephrineStudentsOptics and PhotonicsNeuralgiaGlareVision, OcularPresbyopiaFacultyAstigmatismTime FactorsDisease Models, AnimalPhotic StimulationCytokinesis